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The horse appeared to roll on Liles, who was knocked unconscious, before it hopped back up.

Two paramedics staffing the rodeo provided emergency care and Liles was taken to the hospital.

MedStar spokesman Matt Zavadsky confirmed that an ambulance took a female patient with serious injuries from the rodeo arena to Texas Health Harris Methodist Hospital in Fort Worth.

Liles was not wearing a helmet. Rodeo contestants have the option to wear either a cowboy hat or a helmet during competition, according to the association’s rulebook.

The rules also require contestants’ parents to sign a release granting permission to participate in the events.

Officials with the association declined to comment on the accident, citing federal privacy law. But on Facebook, the association posted that “one of our NT members sustained critical injuries” during the event.

The association asked competitors to wear a turquoise ribbon — Liles’ favorite color — in support of her at a rodeo in Ponder this weekend.

Liles’ family declined to comment on the accident.

Other supporters of Liles were sharing an update from her family on Facebook early in the week. The update said Liles suffered “head trauma” and that a CT scan showed signs of swelling.

“The doctors informed us that at this point it is a waiting game,” the update said.